Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and device for low-delay joint-stereo coding

a low-delay, joint-stereo technology, applied in the field of microphones and hearing aids, can solve the problems of high algorithmic delay, and the inability of both techniques to extend existing mono codecs in a hierarchical way

Inactive Publication Date: 2010-01-07
SIEMENS MEDICAL EQUIPMENT
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a method and device for encoding stereo audio data with low delay and the ability to extend mono codecs in a hierarchical way. The method involves calculating a mono signal as the average of two signals, filtering the mono signal with filters to obtain residual signals, and using those residual signals to estimate the first and second channels of a stereo audio signal. The technical effect of this invention is to provide a more efficient and effective way to encode stereo audio signals."

Problems solved by technology

A lot of joint-stereo approaches in the literature are based on a high resolution frequency domain representation of the input signal (e.g. Intensity Stereo Coding, [2], [5]) and therefore related to a high algorithmic delay.
Both techniques are not suitable to extend existing mono codecs in a hierarchical way.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for low-delay joint-stereo coding
  • Method and device for low-delay joint-stereo coding
  • Method and device for low-delay joint-stereo coding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052]Since the present application is preferably applicable to hearing aids, such devices shall be briefly introduced in the next two paragraphs together with FIG. 1.

[0053]Hearing aids are wearable hearing devices used for supplying hearing impaired persons. In order to comply with the numerous individual needs, different types of hearing aids, like behind-the-ear hearing aids and in-the-ear hearing aids, e.g. concha hearing aids or hearing aids completely in the canal, are provided. The hearing aids listed above as examples are worn at or behind the external ear or within the auditory canal. Furthermore, the market also provides bone conduction hearing aids, implantable or vibrotactile hearing aids. In these cases the affected hearing is stimulated either mechanically or electrically.

[0054]In principle, hearing aids have an input transducer, an amplifier and an output transducer as essential component. The input transducer usually is an acoustic receiver, e.g. a microphone, and / or...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In one aspect a coding of stereophonic audio signals based on inter-channel linear prediction is provided. Each of the two channels is predicted by filtering the center stereo image of both the channels. Optimal filter coefficients are calculated for both channels is a generalization of Mid / Side and Left / Right joint-stereo coding.

Description

[0001]The present invention relates to a method and a device for encoding stereophonic audio signals based on linear prediction. Moreover, the present invention relates to a method for communicating stereophonic audio signals and respective devices for encoding, transmitting and decoding. The invention is also suitable to extend any existing monaural speech or audio codec towards stereo functionality. Specifically, the present invention relates to microphones and hearing aids employing such methods and devices.BACKGROUND[0002]In the present document reference will be made to the following documents:[0003][1] A. Biswas and A. C. den Brinker. Stability of the Stereo Linear Prediction Schemes. 47th International Symposium EL-March 2005, Zadar, Croatia, June 2005,[0004][2] J. Breebaart and C. Faller. Spatial Audio Processing. John Wiley, 2007,[0005][3] E. Torick and T. Keller. Improving the signal to noise ratio and coverage of FM stereo broadcasts. AES Journal, 33(12), dec,[0006][4] H....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): H04R5/00H04R25/00G10L19/00G10L19/008
CPCG10L19/008
Inventor KRUGER, HAUKEVARY, PETER
Owner SIEMENS MEDICAL EQUIPMENT